/Engine/Source/Editor/BlueprintGraph/Public/BlueprintActionFilter.h
Certain actions are associated with specific properties (like delegate node spawners, or variable get/set spawners) This retrieves that property from the wrapped action if it can (not all actions have an associated property).
The property associated with the wrapped action (null if there isn't one).
[FProperty](API\Runtime\CoreUObject\UObject\FProperty) const * GetAssociatedProperty()